Bugeber's Lake (or, Specchio di Venere – Venus' Mirror) is one of the jewels of the island. Its water sparkles like a light blue and green gemstone amidst a typical lush vegetation of endemic plants. Its waters occupy the crater of an extinguished volcano.
The residues of this volcanic activity heat the waters of what is now the most known and visited of the thermal springs of the island. The water of the lake is rich with soda, it is perfect for a healthy peeling of the skin. The temperature is very high and in some places bubbles may be seen on the surface. Mud to spread on the skin is found in these hottest places when the tide withdraws.